I'm brand new to Magento and am looking to implement some custom layered navigation. By that I mean I want to be able to customize the navigation elements on the left hand side and determine what combinations of selections are possible. In addition I want to customise the URLs that those elements link to. This with a view to being SEO friendly.
So my question is this. What would be the best way to go about this? Is there already a plugin out there that already provides this kind of functionality or is custom development required? I'm aware of the extension by Amasty which is close but not ideal.
Any advice greatly appreciated!
That is included in Magento out-of-the-box.
Here is a tutorial to configure the filterable attributes in the layered navigation: